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ISO7221B Status: ACTIVE

Dual Channel, 1/1, 5Mbps Digital Isolator

      
         
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 ISO7221B
Number of Channels2  
Channel Configuration2/0  
Insulation Rating(VRMS)2500  
Supply Voltage(s)(V)3.3, 5  
Datarate(Mbps)5  
Input Noise FilterYes  
TTL/CMOS Input ThresholdTTL  
FootprintADuM1201  
RatingCatalog  
Operating Temp Range(Celsius)-40 to 125  
Approx. Price (US$) 1.20 | 1ku  
Pin/Package8SOIC  
Thermal ShutdownNo  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • ISO7221A: Dual Channel, 1/1, 1Mbps Digital Isolator
  • ISO3088: Isolated 5-V Full & Half-Duplex RS-485 Transceivers
  • ISO7220A: Dual Channel, 2/0, 1Mbps Digital Isolator
  • SN65220: Single Universal Serial Bus Port Transient Suppressor
  • INA128: Precision, Low Power Instrumentation Amplifiers
  • ISO124: Precision Lowest Cost Isolation Amplifier

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Product Information

Features

  • 1, 5, 25, and 150-Mbps Signaling Rate Options
    • Low Channel-to-Channel Output Skew; 1 ns max
    • Low Pulse-Width Distortion (PWD); 1 ns max
    • Low Jitter Content; 1 ns Typ at 150 Mbps
  • Typical 25-Year Life at Rated Voltage
  • 4000-Vpeak Isolation, 560 Vpeak VIORM
    • UL 1577, IEC 60747-5-2 (VDE 0884, Rev 2), IEC 61010-1, IEC 60950-1 and CSA Approved
    • 50 kV/µs Typical Transient Immunity
  • Operates with 3.3-V or 5-V Supplies
  • 4 kV ESD Protection
  • High Electromagnetic Immunity
  • -40°C to 125°C Operating Range
  • APPLICATIONS
    • Industrial Fieldbus
      • Modbus
      • Profibus™
      • DeviceNet™ Data Buses
    • Computer Peripheral Interface
    • Servo Control Interface
    • Data Acquisition

(1) The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).
DeviceNet is a trademark of Open DeviceNet Vendors Association.

Description

The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the channels are oriented in the same direction in the ISO7220 and in opposite directions in the ISO7221. These devices have a logic input and output buffer separated by TI's silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to 4000 V. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, and prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or damaging sensitive circuitry.

A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip-flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure the proper dc level of the output. If this dc-refresh pulse is not received every 4 µs, the input is assumed to be unpowered or not being actively driven, and the failsafe circuit drives the output to a logic high state.

The small capacitance and resulting time constant provide fast operation with signaling rates available from 0 Mbps (dc) to 150 Mbps.(1) The A-, B- and C-option devices have TTL input thresholds and a noise filter at the input that prevents transient pulses from being passed to the output of the device. The M-option devices have CMOS VCC/2 input thresholds and do not have the input noise-filter and the additional propagation delay.

These devices require two supply voltages of 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply and all outputs are 4-mA CMOS.

These devices are characterized for operation over the ambient temperature range of -40°C to 125°C.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSamples
ISO7221BDACTIVE-40 to 1251.35 | 1kuSOIC (D) | 8 View 75 | TUBE
ISO7221BDG4ACTIVE-40 to 1251.35 | 1kuSOIC (D) | 8 View 75 | TUBE
ISO7221BDRACTIVE-40 to 1251.20 | 1kuSOIC (D) | 8 View 2500 | LARGE T&RPurchase Samples
ISO7221BDRG4ACTIVE-40 to 1251.20 | 1kuSOIC (D) | 8 View 2500 | LARGE T&RPurchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

  TI Inventory Status Reported Distributor Inventory
ISO7221BDAs of 11:25 AM GMT, 03 Jul 2009As of 11:25 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 20 Weeks AmericasMouser Electronics 276
 Newark 145
 EuropeAvnet-SILICA 75
ISO7221BDG4As of 11:25 AM GMT, 03 Jul 2009As of 11:25 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 20 WeeksNone Reported
View Distributors		   
ISO7221BDRAs of 11:25 AM GMT, 03 Jul 2009As of 11:25 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 20 WeeksNone Reported
View Distributors		   
ISO7221BDRG4As of 11:25 AM GMT, 03 Jul 2009As of 11:25 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 20 WeeksNone Reported
View Distributors		   
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
ISO7221BD RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ISO7221BDG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ISO7221BDR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
ISO7221BDRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for ISO7221B Help

Datasheet

Application Notes

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